Whoever told you this is confusing various topics in bolt classification. I'm not quite sure what they're trying to say about bolts being stamped 8.8...
Ok, so... there is vacuum to the center post of the vacuum solenoid, even at cold idle. That’s the hose that comes directly from the thermal switch. ...
Yeah, a smoke test isn't a bad idea. I just replaced the injector seals a few weeks ago, actually - new clips, too. I know the CSV has the O-ring on...
Jonathan: quick update, I went and checked those top top end grounds. Everything good to go, I did polish the ring terminal for the 456 bank one but...